Upon examining the egg sacs in Sarachnis' lair, the chatbox will state "It's making sounds inside. It's going to hatch soon!" This is the verbatim message that is given upon checking the status of a Pokémon egg that will hatch soon in Pokémon Gold, Silver and Crystal.

Sarachnis was originally going to be an instanced solo boss, but was reworked into a non-instanced boss in a multicombat area after player complaints about the abundance of bosses being fought in instances already.